Electric motor



(No Model.) 2 Sheefts-Sheet l'.

W. P. GARSTARPHEN, Jr, ELECTRIC MOTOR.

No. 508,129. Patented-NOV. 7, 189s.'

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(No Model.) 2 Sheets-Sheet 2.

W. RUARSTARPHEN, J1.

ELECTRIC MUTOR. No. 508,129. Patented NOV. 7, 1893.

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UNITED STATES PATENT OFFICE.

WILLIAM P. CARSTARPHEN, JR., OF DENVER, COLORADO.

y ELECTRIC MOTOR.

SPECIFICATION forming part of Letters Patent No. 508,129, dated November 7, 1893.

Application filed November 18,1892. Serial No. 452,459. (No model.)

To all whom it may @o7/www5 Y Be it known that I, WILLIAM P. CARsTAR- PHEN, J r., a citizen of the United States of America, residing at Denver, in the county of Arapahoe and State of Colorado, have invented certain new and useful Improvements in ElectricMotors; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to improvements in electric motors and the object of the invention is to provide a device of this class which while being of simple, compact and economical construction, shall be reliable, durable and eicient in use.

To these ends the invention consists of the features, arrangements and combinations hereinafter described and claimed, and will be fully understood by reference to the accompanying drawings, in which is'illustrated an embodiment thereof. v

In the drawings, Figure 1 is an elevation of the motor provided with a `brush connected in operative relations with the armature by means of suitable gearing. Fig. 2 is alongitudinal section of the same, the armature, however, being shown in elevation. Fig. 3 is a transverse section of the motor taken through the armature and field magnets. Fig. 4 is an inner end view of the rotatable cap carrying the brushes through which the current from the generator passes. Fig. 5 is section taken on the line .fr-sc, Fig. 4. Fig. 6 is an end view of the motor with the cap removed. Fig. 7 is a similar view on a larger scale. In this view several differentv positions of the brushes are shown in dotted lines corresponding with different positions of the cap.

Similar reference characters indicating corresponding parts or elements of the mechanism in the several views let the numeral 5 designate a cylindrical iron shell or case inclosing the pole pieces 6, secured to the shell by screws 7' 7. These pole pieces are cut away longitudinally on two opposite sides and wound from end to end in series forming the coils 8, the extremities 8a and 8C of which are attached respectively to the parts 9 and 9 of a divided contact plate secured to the shell at one end of the pole pieces and insulated from both the shell and said pieces as shown at 10. The parts 9 and 9 of the divided contact are insulated from each other as shown at B, B. The connection between the series-wound field-coils is shown at l2 in Fig. 3.

' The armature 13 consists of the elongated H-shaped core 14 and the coil 15 wound from end to end orlongitudinally thereon between the extremities 16 and 16a. The extremities 17 and 17L ofthe coil are respectively connected with the segments 18 and 18a of atwo part commutator attached to the armature but insulated therefrom by a disk 19. The armature core is formed integral and its extremities are provided with shouldered journals 2O and 20, the one passing through an aperture formed in the closed end 5a of the case and the other entering a recess 21 formed in the rotatable capA 22. The armature is held in place by this cap which in turn is secured in operative relation to the shell by screws 23 passing through apertures in the shell and entering a circumferential groove 24 formed in rim or flange 25 of the cap which enters the shell far enough for the purpose. As shown in the drawings the journal 2Oa is provided with a beveled pinion 26 meshing with a gear wheel 27 carried bya spindle 28 to which is secured a removable brush 29. This brush is formed in sections and I reserve the right to claim the same in aseparate application to be subsequently filed. Instead of the cogged pinion 26 a friction disk or pulley may be employed, the spindle carrying a corresponding friction wheel. This construction is preferable for some purposes, since when the spindle is actuated through a frictional connection with the armature, the movement of the motor is practically noiseless. It will be readily understood that any suitable tool designed for rotative operation may be attached to this spindle, which is supported in a sleeve 30 attached to a ring 32 As shown in the` made fast to the shell 5.

drawings this ring is formed integral with the shell extremity or disk 5a. The free extremity of spindle 28 enters an aperture or recess IOC formed in a lug on the inner surface of the ring. The cap 22 carries the brushes 33, 34 and 35 which are insulated therefrom and held in place by suitable screws 36. These brushes maybe composed of any suitable material forming a good conductor for the electric current, preferably copper. Brush 35 has two contact arms 35 and 35C, the former adapted to engage the contact ring composed of parts 9 and 9n heretofore described while the latter engages the commutator. Brushes 33 and 34 are insulated from each other, the one engaging the commutator and the other the divided contact ring. The current enters the motor through one ot' the brushes 33, 34 and passes out through the other. For instance, it it enters at 33 it passes out at 34, and vice Versa. The brushes 33 and 34 are connected with the circuit wires 37 and 38 leading from the electrical source or from the main circuit, by wires 39 and 40 leading from the respective brushes to a post 46 anda twoparteontact4l respectively. Thispostismade fast to an insulating base 42 secured to the cap 22. One wire 37 is electrically connected with this post through the medium of a contact washer 43 so connected with the post that the latter may turn freely without rotating the washer. One part 41 of the divided contact 4l turns independentlyT of the post, or remains stationary while the latter rotates; the other part, 41C of the contact, is made iast to the post and turns therewith. The two-part contact 41 is insulated from the post. This construction gives the current two separate paths insulated from each other, through one of which it passes to the motor, while it passes from the same 'ma the other. It also permits the free movement of the cap 22 without disturbing the circuit wires 37 and 3S, since the parts to which they are connected remain stationary while the post moves. The movable contacts are held in place upon the post 46 by a nut 44 separated from contact 43 by a washer 45.

If we assume that the current enters the motor through wire 37, it may be said to pass through contact 43, post 46, conductor 39, br-ush 34 to one part 9 or 9 of the divided contact and thence through the coil of the pole pieces to the other part of the divided contact, thence through brush 35, va arm 35 and out through arm 35c to one segment of the commutator, thence through the armature coil and out through the other commu tator segment and thence through brush 33,conductor 40, the divided contact 4l and out through wire 38 to the other pole of the source.

This motor, as shown in the drawings, is intended to be held in the hands of the user and operated from a battery source. Hence it is specially advantageous in doing work or performing functions heretofore only accomplished by muscular effort. Among its uses may be Inentioned the grooming or cleaning of horses, removing dirt or stains from the Walls of buildings and for polishing purposes of all. kinds, as in blackng and polishing stoves, shoes, dac.

The motor is fully under the control of the user, and may be started, reversed and stopped at pleasure by manipulating the movable cap 22 carrying the contact brushes. The use of this cap is illustrated in Fig. 7 where different positions of the brushes are illustrated in dotted lines. For instance, when the extremities of the brushes are in the positions shown at A, brush 34 and one arm of brush 35 engage theinsulation B sepa.- rating parts 9 and 9 of the divided contact ring whereby the circuit is broken. Now to start the armature in one direction it is only necessary to turn the cap until these brush extremities occupy positions shown at D; while it may be started in the opposite direction by giving the cap a partial opposite turn when the brush extremities are in the positions shown at C.

Having thus described my invention, what I claim isw 1. In an electric motor the combination of an armature composed of the elongated H- shaped integral iron core wound from end to end and a movable commutator attached to one end of the armature to which theterminais of the armature coils lead, the field magnets, and a closed cylindrical iron shell or case surrounding the same, and a divided contact plate with which the terminals of the field coils a-re connected, and the movable cap carrying brushes engaging the armature and the divided contact plate, substantially as described.

2. In an electric motor the combination of the armature and fields, a commutator to which the terminals of the armature coils lead a divided contact plate with which the terminals of the iield coils are connected, and a movable cap carrying brushes engaging the armature and the divided contact, substantially as described.

3. In an electric motor the combination of the armature andtield magnets, of a movable cap carrying a double brush and two single brushes, one single brush and one arm of the double brush engaging the commutator of the armature, the other single brush and the other arm of the double brush engaging a divided contactconnected with the field coils, and suitable connections with the external circuit, substantially as described.

4. In an electric motor the combination of the armature, the field magnets, and a suitable case, of a rotatable cap provided with a post carrying movable contacts with which the terminals of the external circuit are connected and suitable means for connecting the iield and armature coils with these contacts whereby as the cap is turned, the contacts swivel on its post,substantially as described.

5. An electric motor having the armature and tield coils inclosed in a suitable case,

the armature being journaled in the heads of the case, one journal projecting from the case and carrying a pinion or friction pulley andy In testimony whereof I affix my signature in a spindle journaled in a projection attached presence of two Witnesses. to the case and carrying a gear or friction pulley connected With the friction pulley or pin- 5 ion of the armature whereby as the latter ro- Witnesses:

tates the spindle is actuated, substantially as WM. MCCONNELL, described. Gr. J. ROLLANDET.

WILLIAM P. CARSTARPHEN, JR. 

